Question : Which one of the following elements is an example of noble gas?
Option 1: Nitrogen
Option 2: Hydrogen
Option 3: Chlorine
Option 4: Helium
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Correct Answer: Helium
Solution : The correct option is Helium.
Nobel gases are generally inert. Despite this, these gases are also odourless and colourless. Several noble gases form a group in the Periodic table. Helium is a noble gas.
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